Two men have died in separate stabbing incidents in north London.
In the first incident, officers were called to Bromley Road in Walthamstow, in the north-east of the capital, at 7.16pm on Thursday after reports of a fight. They discovered two men with knife wounds when they arrived alongside the London ambulance service.
One man in his 20s was pronounced dead at the scene and police are informing his next of kin. The second man, also believed to be in his 20s, was taken to hospital where his condition was not thought to be life-threatening.
A man has been arrested in connection with the incident.
An hour later, police were called to an incident at the Barnet A1 bypass near Scratchwood Park. A man in his 20s with stab wounds was found and taken to hospital.
While searching a nearby car, police discovered another man, believed to be in his 30s, with multiple stab wounds. Despite treatment from paramedics he died a short time later.
A witness told the MyLondon news site that more than 10 police vehicles arrived at the scene, where a forensic tent had been erected.
Police are asking anyone with information about either incident to call them on 101 quoting CAD reference 6838/Dec19 for Walthamstow or 7486/19DEC for Barnet. Anyone wishing to remain remain anonymous should call Crimestoppers on 0800 555 111.
Police also urged young people with information about violence or knife crime to visit www.fearless.org where they can pass on information anonymously to a charity that is independent of the police.